Отрезки АВ{"color":"#202335","fontFamily":"stix","language":"ru"} и CD{"color":"#202335","fontFamily":"stix","language":"ru"} являются хордами окружности. Найдите длину хорды CD{"color":"#202335","fontFamily":"stix","language":"ru"}, если АВ=18{"color":"#202335","fontFamily":"stix","language":"ru"}, а расстояние от центра окружности до хорд AB{"color":"#202335","fontFamily":"stix","language":"ru"} и CD{"color":"#202335","fontFamily":"stix","language":"ru"} равны соответственно 12{"color":"#202335","fontFamily":"stix","language":"ru"} и 9{"color":"#202335","fontFamily":"stix","language":"ru"}.
